Core-Level Photoelectron Spectroscopy of Metal Clusters at FLASH

29th International Conference on Photonic, Electronic, and Atomic Collisions

Martinez, F.^1 ; Oelßner, P.^1 ; Köther, M.^1 ; Tiggesbäumker, J.^1 ; Meiwes-Broer, K.H.^1 ; Bauer, D.^1 ; Ganteför, G.^2 ; V. Issendorff, B.^3 ; Meyer, M.^4 ; Müller, T.^5 ; Rühl, E.^6

University of Rostock, Germany^1

University of Konstanz, Germany^2

University of Freiburg, Germany^3

European XFEL, Hamburg, Germany^4

TU Berlin, Germany^5

FU Berlin, Germany^6

关键词: Cluster densities;    Core level shifts;    Core-level photoelectron spectroscopy;    Low energy secondary electrons;    Photo absorption cross sections;    Relaxation channels;    Selected metals;    Size dependent;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/635/11/112116/pdf
DOI  :  10.1088/1742-6596/635/11/112116

来源: IOP

【 摘 要 】

Free size-selected metal clusters are investigated by core-level photoelectron spectroscopy at the free electron laser FLASH. The binding character of the clusters, as well as a multitude of relaxation channels are indicated by size- dependent core-level shifts and low-energy secondary electron emission, respectively. A new apparatus including a cryogenic ion-trap is currently built to extend the studies towards the smallest cluster sizes (less than 10 atoms), where low photo-absorption cross sections have to be matched by increased cluster density.